I assume you are using Winders XPreinstall driver as follows1st download driver from acer website thengo to control panelsounds & audio deviceshardware tabscroll down list and find your audio deviceright click and select propertiesgo to driver tab and update driver
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I assume you are using Winders XP
reinstall driver as follows
1st download driver from acer website
then
go to control panel
sounds & audio devices
hardware tab
scroll down list and find your audio device
right click and select properties
go to driver tab and update driver